Reamer



I c. E. BROWNE REAMER Filed Dec. 27, 1922 INVENTOR. CH/ISA Eu BROWNS Patented Nov. 11, 1924.

UNITED STATES PATENT MESASG CHARLES E. BROWNE, F OAKLAND, CALIFORNIA.

I REAMER.

Application filed December 27, 1922. Serial No. MAM.

I j ustable type.

An object of the invention is to provide a reamer of comparatively simple construction having at the same time combined therein the most advantageous features of the many different types now in use. More specifically expressed the aim is to embody in one reamer, first the advantage of the spiral reamer in its ability to eliminate the chatter when reaming a hole having key-ways or oil grooves, second the economy afiorded the expansion ream'er in its adaptability to reaming holes of difierent diameters, and third, the capability of the adjustable reamer to perform high clam work for all size bores by its ability to-maintain atall times the most effective relation of the guide and cutting elements.

Another object' of the invention is to provide a. reamer in which the cutting members and guide elements may be adjusted simultaneously or independently of each other.

A further object is to provide a reamer which will insure the reaming of a round true hole. a

This invention possessesother ob'ects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of my invention which is illustrated in the draw ings accompanyin and forming part of the specification. It 1s to be understood that I do not limit myself to the showing made by the said drawing and description, as I may adopt variations of the preferred form within the scope of my invention as set forth in the claims.

Referring to said drawings:

Figure l'is a side view of the reamer.

Figure 2 is a longitudinal section taken at right angles to. Fi rel, the plane of the section being for t li e purpose of clearness indicated on Figure, 1 by the line 2. -2.

Figure 3 is a transverse section of the reamer taken on the line 3 3 of Figure 2.

Figure 4 is a perspective view of one of the guide members.

Figure 5 is a transversesection similar to parallel to the axis of Figure 3, but showing a-modified form of the reamer. a

The reamer in its preferred form comprises a body member 6 provided with a plurality of radially disposed longitudinally extending grooves 7 having their bottoms inclined to the longitudinal axis of the body. Mounted on the body and provided with integral ribs 8 which slidably engage inthe grooves 7 are a plurality of guide members 9. The lower face of each rib 8 is inclined to correspond with the slope of the bottomof the grooves so that when the guides are moved longitudinally in the body they will move radially of the body and maintain the outer surface 12 of the guides longitudinally the reamer. The outer surfaces 12 of the guides are segmental and are arranged tobear against the sides of the hole durlng the progress of the reamer therein. .The guides,' it will be noted, are distributedcircumfrentially so that at least three bearing points thereon will extend over an arc of at least 180. In this manner the guides rather than the cutters control the position of the reamer as it progresses through the hole.

By referring particularly to Fi re 1, it will be seen. that the longitudinal e ges13 of the guides 9 are formed oblique to the longitudinal axis of the reamer body. It will alsobe seen that the edges 13 of adjacent guides are parallel and spaced from each other thereby defining oblique openings 14 between the guides. By means of these openings'the reamer is, in effect, spirally fluted and thus prevents the chatter which .is usually prevalent when reaming a hole havmg. key-ways or oil grooves.

Formed in one or more of the guides is a groove 16 which in the present embodiment extends parallel to the longitudinal axis of vthe body and is provided with an inclined simultaneously or independently, and wit".

them rigidly in adjusted position. In accordance with the foregoing, the opposite end portions 18 and 19 of the body 6 are threaded and engaged by nuts 21 which are beveled at the inner end to engage correspondingly beveled ends of the ribs 8. By simultaneously varying the positions of the nuts the guides may be simultaneously moved longitudinally and their radial position varied accordingly, thereby adapting them for use for different/sized holes. The nuts 21 are threaded externally as well as internally and are in turn engaged by nuts 22 which are also provided with beveled ends to engage the beveled extremities 23 of the blade 17, thus allowing radial adjustmentof the cutting edge of the blade with respect to the surfaces of the guides. It will be understood that ifreadjustment of the reamer is desired without altering the relations between the cutting blade and guides, the same may be accomplished by merely ad usting the inner nuts 21, the outer nuts 22 obviously maintaining their original relation with respect to the blade when adjustment is completed. If, on the other hand, adjustment of the blade with respect to the guides is desired, the outer nuts 22 may be moved independently of the nuts 21. The nuts 21 and 22 are preferably provided with flattened portions in order that they may be readily turned with a wrench or similar tool.

The cutting edge 35; the blade 17 is curved or otherwise form to present a convex shaped edge, and is adapted to be positioned in the groove 16 so that while the center portion will project above the surface of the ides, the end portions 23 thereof will lie inwardly of the guide surface for a considerable part of their length. In this manner the guides may be setto fit closely in the original bore and project inwardly a considerable distance ahead of the place where the blade is cutting, thus serving to control the cutting operation during the progression of the reamer and insuring an absolutely cylindrical hole. By virtueof the recession of the rear end portion of the blade, there will be no likelihood of marring the smooth fin- .30 ish of the wall of the new bore.

In Figure 5, the alternate guides are provided with blades, the increased number of blades affording faster cutting.

I claim:

1. A reamer comprising a body, a radially adjustable guide member mounted on said body and inclined to the longitudinal axis thereof, and a straight blade arranged independently of said guide.

2. A reamer comprising a body, a plurality of radially adjustable guide members mounted on said body and progressing obliquely to the longitudinal axis thereof, and a straight blade carried by the guide and radially adjustable said blade arranged parallel to said axis.

3. A reamer comprising a body, a plurality of radially ad ustable guide members mounted on said body and progressing 0bliquely to the longitudinal axis of the bod and a radially adjustable straight bla e held on said body.

4. A reamer comprising a body member provided with longitudinally extending radial grooves, a 'guide member slidably mounted in said grooves and provided with a longitudinally extending groove, a cutting blade slidably mounted in said second groove, means for adjustably holding said guide and said blade on the body.

5. A reamer comprising a body member provided with a plurality of radial grooves extending parallel to the longitudinal axis of. the body, guide members mounted insaid grooves and having their side edges inclined with respect to said axis, one of said ides being provided with a longitudinalfi extending groove, a blade mounted in said groove, and means for adjustably holding said guides and said blade independently in fixed position relative to said body.

6. A reamer comprising a body having a plurality of radial grooves extending parallel to the longitudinal axis thereof, a plura-lity of guide members slidably mounted in said grooves and spaced from each other by passages inclined to said axis and defined by the side edges of the members, means for holding said guides on the body whereby they may be radially adjusted, a blade arranged between a pair of said guides, and means for radially adjusting said blade independently of the guides.

7. A reamer comprising a body having externally threaded end portions and pro vided with radial grooves extending longitudinally of the body and having an inclined base, a plurality of guide members slidably mounted in said grooves and provided with a groove extending substantially longitudinally of the guide, a blade slidably mounted in said latter groove, an internally and externally threaded nut engaging each of said threaded portions and adapted to engage the opposite ends of said members, and nuts rotatable on and engaging said first nuts adapted to'engage the opposite ends of said blade.

8. A reamer comprising a body having externally threaded end portions and provided with radial grooves extending longitudinally of the body and having an inclined base, a plurality of guide members slidably mounted in said grooves and separated from each other by passages inclined to the longitudinal axis of the body and defined by the side edges of the members, said guide members being provided with grooves extending longitudinally of said body, a blade slidably 7 mounted in said latter grooves, an internally portions on said body separated by a substantially longitudinally extending opening,

' a blade interposed between said portions and having a curved cutting edge whose intermediate and end portions are adapted to respectively lie radially outward and inward of the outer surface of said guides and within the area defined thereby.

10. A reamer comprising a body, a plurality of guides slidably mounted on said body, a blade movable longitudinally of the body, and adjusting members positioned one within the other and adjacent an end of said blade and guides and arranged to efi'ect radial adjustment of said blade and guides.

11. A reamer comprising a body, a guide slidably mounted thereon, a blade movable lon itudinally of the guide, and independently operable members positioned one withinthe other and at opposite ends of said guide and blade and arranged to effect radial adjustment of said blade and guides.

12. A reamer comprising a body having threaded end portions, a guide member slidably mounted therein, a blade member movable longitudinally of the said guide, nuts threaded internally and externally and engaging said body threaded portions, said nuts being arranged to engage the opposite ends of one of said members, and internally threaded nuts engaging on said first nuts and engaging the opposite ends of the other of said members, said nuts bein arranged to effect the radial adjustment said blade and guides.

In testimony whereof I have hereunto set my hand, at Oaklan Dec., 1922.

CHARLES E. BROWNE.

, this 16th day of 

